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Organic light-emitting diode pixel circuit, driving method thereof, and display device

a light-emitting diode and circuit technology, applied in the field of touch display technology, can solve the problems of degrading the display quality of the display screen, unfavorable improvement of production yield and production efficiency, and complicated control circuit and manufacturing process, and achieves simple timing, less control signals, and easy-to-implement circuit

Active Publication Date: 2016-03-15
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an OLED pixel circuit with a simplified control circuit and manufacturing process. The circuit includes a photodiode that enables direct touch sensing, reducing the complexity of the control circuit and manufacturing process. This improves production efficiency, yield, and reduces production cost. The circuit also compensates for non-uniformity of the threshold voltage of a TFT, improving picture uniformity of the display. Additionally, omitting two layers of indium tin oxide films in production process can improve light transmittance, improving display quality. The display device including this circuit is thinner, lighter, and lower in production cost with improved sensitivity to touch. The driving method of the circuit is simple and practical.

Problems solved by technology

The inventors found that at least the following problems exist in the prior art: for an in-cell touch screen, as the function of the touchpad to sense signals is embedded in the pixel circuit, its control circuit and manufacturing process are relatively complicated, which is unfavorable for improving production yield and production efficiency.
In addition, for the in-cell touch screen, its pixel aperture ratio may be decreased, which further results in degraded display quality of display screen.

Method used

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  • Organic light-emitting diode pixel circuit, driving method thereof, and display device
  • Organic light-emitting diode pixel circuit, driving method thereof, and display device
  • Organic light-emitting diode pixel circuit, driving method thereof, and display device

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embodiment 1

[0055]This embodiment provides an OLED pixel circuit, which comprises:

[0056]a data writing unit, a driving unit, an OLED, a first control unit, a second control unit and a touch detecting unit; wherein,

[0057]the first control unit, in a touch detecting stage and an OLED light-emitting stage, is used for importing a power supply voltage signal into the data writing unit under the control of a scanning line, and, in the OLED light-emitting stage, is used for turning on the OLED and the driving unit;

[0058]the data writing unit, in the touch detecting stage and the OLED light-emitting stage, is used for importing the power supply voltage signal under the control of a first light-emitting control line, and importing a data line signal under the control of the scanning line and a second light-emitting control line, and meanwhile is used for supplying voltage to the driving unit;

[0059]the touch detecting unit, in the touch detecting stage, is used for sensing touch under the control of a t...

embodiment 2

[0096]This embodiment provides a display device, which comprises the above-described OLED pixel circuit, and of course comprises other known structures such as a substrate. The display device may be an OLED display device or a product or component with display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital frame or a navigator, which uses OLED display technique.

[0097]The display device of this embodiment comprises the above-described OLED pixel circuit, and therefore, it is thinner in overall thickness, lighter in weight, and lower in production cost. By providing the above circuit in each sub-pixel, sensitivity of the display screen to a touch may be significantly improved, and furthermore, as the photodiode works by sensing changes of light, floating touch can be achieved on the display screen.

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Abstract

The present invention, provides an OLED pixel circuit, a driving method thereof and a display device. A first control unit of the OLED pixel circuit of the present invention is used for importing a power supply signal into a data writing unit and turning on an OLED and a driving unit; the data writing unit is used for importing a power supply voltage signal and a data line signal, and meanwhile for supplying voltage to the driving unit; a touch detecting unit is used for sensing touch and generating a detecting signal; the driving unit is used for converting the detecting signal into touch output signal which is output to a driving IC via the touch detecting unit and for providing drive current for the OLED; and a second control unit is used for connecting the driving unit to ground level.

Description

[0001]This is a National Phase Application filed under 35 U.S.C. 371 as a national stage of PCT / CN2013 / 089518, filed Dec. 16, 2013, and claims priority benefit from Chinese Application No. 201310329850.1, filed Jul. 31, 2013, the content of each of which is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention relates to the field of touch display technology, and particularly, to an organic light-emitting diode (OLED) pixel circuit, a driving method thereof, and a display device.DESCRIPTION OF THE RELATED ART[0003]Touch screen, as one of the simplest, most convenient, and most natural human-machine interactive devices, has been widely applied in various electronic products, such as mobile phones, notebook computers, digital cameras and the like. Touch screens, according to the installation techniques, may be classified into two types, namely, external touch screens and in-cell touch screens. An external touch screen is formed by, on a dis...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G09G3/30G09G5/18G09G3/32G06F3/041G06F3/044
CPCG06F3/044G06F3/0412G09G3/3208G09G3/3225G09G5/18G09G2300/0404G09G2300/0842G09G2310/0251G09G2360/142G06F3/04184G06F3/042G09G2300/0819G09G2300/0852G09G2300/0861
Inventor ZHOU, QUANGUOQI, XIAOJING
Owner BOE TECH GRP CO LTD
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